refactor!: Remove iConn.setTimeout()

This was used to set the timeout of `iConn.run()` when in sync mode.

We no longer support sync mode therfore this is now removed.

lib/Deprecated.js

@@ -434,15 +434,6 @@ class iConn {
     this.connection = new Connection(options);
   }
 
-  /**
-   * @description override the default timeout value for sync mode.
-
-   */
-  // eslint-disable-next-line class-methods-use-this
-  setTimeout() {
-    iConnDeprecate('As of v1.0, \'iConn.setTimeout()\' is deprecated and sync mode is disabled');
-  }
-
   /**
    * @description
    * enables or disables the verbose mode for debugging